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I don't know about "classical," but this is the approach Dissent [0] takes to thwarting traffic analysis. Communication is broken into "rounds" and intervals within those, so that every packet is indistinguishable from the outside based on size alone.

[0] http://dedis.cs.yale.edu/dissent/

Certainly a possible strategy, but for web traffic it isn't ideal: web traffic is bursty and latency-sensitive. You can also probably still do a little bit of correlation for very large, long uploads to servers with not much other usage, but admittedly that's a much smaller target.

That seems like a sensible solution to beating part of the problem. I would agree - does anyone have any insights on this method in regards to TOR?